52 lines
1.9 KiB
JavaScript
52 lines
1.9 KiB
JavaScript
import { PrismaClient } from "@prisma/client";
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import LCD from "raspberrypi-liquid-crystal";
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const prisma = new PrismaClient();
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const TICK = 250;
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const WAIT = 10;
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const lcd = new LCD(1, 0x27, 16, 2);
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lcd.beginSync();
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lcd.clearSync();
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const timer = (ms) => new Promise((res) => setTimeout(res, ms));
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const getStanza = async () => {
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const stanzaCount = await prisma.stanza.count();
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const skip = Math.floor(Math.random() * stanzaCount);
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const randomStanza = await prisma.stanza.findMany({
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skip: skip,
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take: 1,
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});
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return randomStanza[0].text;
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};
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const tag = " Black Portal 4856 E Davison, Detroit ";
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let tagCharacterLocation = 0;
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setInterval(() => {
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lcd.printLineSync(1, " ");
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setTimeout(() => {
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lcd.printLineSync(1, tag.substring(tagCharacterLocation, 16 + tagCharacterLocation));
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}, WAIT);
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tagCharacterLocation++;
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if (tagCharacterLocation > tag.length) {
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tagCharacterLocation = 0;
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}
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}, TICK);
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while (true) {
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let stanza = await getStanza();
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let stanzaOuterInterval;
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let stanzaInnerInterval;
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let stanzaCharacterLocation = 0;
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stanzaOuterInterval = setInterval(async () => {
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lcd.printLineSync(0, " ");
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stanzaInnerInterval = setTimeout(() => {
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lcd.printLineSync(0, `${16 - stanzaCharacterLocation > 0
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? Array(16 - stanzaCharacterLocation).join(" ")
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: ""}${stanza}`.substring(stanzaCharacterLocation, 16 + stanzaCharacterLocation));
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}, WAIT);
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stanzaCharacterLocation++;
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if (stanzaCharacterLocation > stanza.length) {
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stanza = await getStanza();
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stanzaCharacterLocation = 0;
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}
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}, TICK);
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await timer((16 + stanza.length) * (WAIT + TICK));
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clearInterval(stanzaOuterInterval);
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clearInterval(stanzaInnerInterval);
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}
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